File poissonspot setup treisinger.jpg 400px thumb right Aragospot experiment. A point source for example .... This bright spot is referred to as the AragoSpot or the Poisson spot. In optics , an Aragospot , Fresnel ... of laser laser sources available today it is easy to perform a Aragospot experiment see for example http www.princeton.edu rvdb images Questar PoissonSpot.html here . In astronomy , the Aragospot ... constitutes the circular obstacle. The presence of the Aragospot can be easily understood ... be no light at all. History The original Aragospot experiment was carried out in the beginning of the 19th .... As mentioned before the Aragospot is not easily observed in every day situations, so it was only ... that the phenomenon which was later to be known as Poisson s Spot or the Spot of Arago had already been ... object was not present at all. Furthermore, this means that the Aragospot is present even ... aspects Observation of the Aragospot with a conventional light source can be challenging ... spot. Intensity and size For an ideal point source the intensity of the Aragospot equals that of the undisturbed wave front . Only the width of the Aragospot intensity peak depends on the distances ... and screen The following images show the radial intensity distribution of the simulated Aragospot images ... The main reason why the Aragospot is hard to observe in circular shadows from conventional light ... a finite size S then the Aragospot will have an extent that is given by S b g , as if the circular object acted like a lens. ref name sommerfeld At the same time the intensity of the Aragospot is reduced ... edge on a smaller scale the shape of the point source Aragospot changes. In particular, if the object has an ellipsoidal cross section the Aragospot has the shape of an evolute . ref name coulson1922 ... source the Aragospot is only affected marginally, since one can interpret the Aragospot as a point ... object s surface roughness The Aragospot is very sensitive to small scale deviations from the ideal ... more details
Arago may refer to Astronomy Arago Martian crater , a crater on Mars Arago lunar crater , a crater on the moon Fiction Arago, a character in Ronin Warriors see Talpa Ronin Warriors People Arag , a family name Juan Arago Dominque Fran ois Jean Arago 1788 1836 , a brigadier general in the Mexican army Fran ois Arago 1786 1853 , a French mathematician, physicist, astronomer, and politician Phenomena Aragospot , a bright spot in the middle of the shadow of a circular object used as a proof of the wave theory of light. Places Arag , the name for Aragon in Catalan Arago, Oregon , in the United States Arago Township, Minnesota , in the United States Ships Arago ship , the first steel ship launched by the San Francisco shipyards in the 19th century USC&GS Arago USC&GS Arago , the name of more than one ship of the United States Coast Survey and United States Coast and Geodetic Survey USS Arago 1861 USS Arago 1861 , an armed survey ship that served in the United States Navy from 1861 to 1863 Computers Arago database , a database created by WordTech purchased by Borland Comics Arago manga a manga created by Arai Takahiro disambig de Arago es Arago fr Arago homonymie ru sv Arago ... more details
by observing what is now known as Aragospot the spot of Arago . The two philosophers conducted together ...Use dmy dates date September 2011 Infobox Prime Minister name Fran ois Arago image Arago Francois portrait.jpg ... Fran ois Jean Dominique Arago lang ca Francesc Joan Dom nec Arag , known simply as Fran ois Arago ... mathematician , physicist , astronomer and politician . Early life and work Arago was born at Estagel ... 1836 emigrated to North America and became a general in the Mexico Mexican army. Jacques Arago Jacques ... brother, tienne Arago tienne Vincent de 1802 1892 , is said to have collaborated with Honor de Balzac ..., mostly in collaboration. Showing decided military tastes, Fran ois Arago was sent to the municipal ... Arago entered the cole Polytechnique , Paris, but apparently found the professors there incapable ... of P. F. A. M chain in 1804 . Arago and Biot left Paris in 1806 and began operations along the mountains ... point to which they were to carry the survey. Arago continued the work until 1809, his ... to the Balearic Islands , and the population suspected Arago s movements and his lighting of fires ... into the hands of a Spanish Privateer corsair . With the rest the crew, Arago was taken to Roses ... imprisonment, Arago and the others were released on the demand of the dey of Algiers, and again set ... have occasioned a weary delay of three months Arago, therefore, set out over land, guided by a Muslim ..., was from Alexander von Humboldt and this was the origin of a connection which, in Arago s words, lasted over forty years without a single cloud ever having troubled it. Scientific studies Arago had ... of the observations being published in 1821, along with those made in Spain. Arago was elected ... on civil engineering , as well as interesting memoirs of members of the Academy. Arago s earliest ... rotatory magnetism, what has been called Arago s rotations , and the fact that most bodies could be magnetized these discoveries were completed and explained by Michael Faraday . Arago warmly supported ... more details
1005 Arago is an asteroid . It was discovered by Sergei Ivanovich Belyavsky on September 5, 1923. Its provisional designation was 1923 OT . It is named after mathematician Fran ois Arago . External links JPL Small Body MinorPlanets Navigator 1004 Belopolskya 1006 Lagrangea MinorPlanets Footer DEFAULTSORT Arago Category Main Belt asteroids Category Discoveries by Sergei Belyavsky Category Asteroids named for people Category Astronomical objects discovered in 1923 beltasteroid stub an 1005 Arago ca 1005 Arago de 1005 Arago el 1005 es 1005 Arago eo 1005 Arago eu 1005 Arago fa fr 1005 Arago hr 1005 Arago it 1005 Arago la 1005 Arago hu 1005 Arago ja no 1005 Arago nn 1005 Arago pl 1005 Arago pt 1005 Arago sk 1005 Arago sr 1005 Arago tl 1005 Arago uk 1005 vi 1005 Arago yo 1005 Arago zh 1005 ... more details
USC&GS Arago was the name of two ships of the United States Coast Survey and the United States Coast and Geodetic Survey, and may refer to USC&GS Arago 1854 USC&GS Arago 1854 , a schooner in service in the Coast Survey Coast and Geodetic Survey from 1854 to 1881 USC&GS Arago 1871 USC&GS Arago 1871 , a steamer in service in the Coast Survey from 1871 to 1878 and in the Coast and Geodetic Survey from 1878 to 1890 Shipindex DEFAULTSORT Arago Category Ships of the United States Coast and Geodetic Survey ... more details
USCS Arago was the name of two ships of the United States Coast Survey, both of which later served in the United States Coast and Geodetic Survey, and may refer to USCS Arago 1854 , a schooner in service in the Coast Survey from 1854 to 1861 and from 1866 to 1878, and in the Coast and Geodetic Survey as USC&GS Arago 1854 USC&GS Arago 1854 from 1878 to 1881 USCS Arago 1871 , a steamer in service in the Coast Survey from 1871 to 1878 and in the Coast and Geodetic Survey as USC&GS Arago 1871 USC&GS Arago 1871 from 1878 to 1890 Shipindex Arago DEFAULTSORT Arago Category United States Coast Survey ship names ... more details
File Arago, Jacques colored .jpg thumb Jacques tienne Victor Arago 6 March 1790 27 November 1855 was a French writer, artist and explorer, author of a Voyage Round the World . Biography Jacques was born in Estagel , Pyr n es Orientales . He was the brother of Fran ois Arago 1786 1853 , a scientist and politician, the most famous of the four Arago brothers. His two other brothers were Jean Arago 1788 1836 , a general in the Mexico Mexican army and tienne Arago 1802 1892 , a writer and politician. Jacques Arago joined Louis de Freycinet on his 1817 voyage around the world aboard the ship Uranie , which inspired his witty Voyage autour du monde . ref name arago cite book author Jacques Arago title Narrative of a voyage round the world, in the Uranie and Physicienne corvettes, commanded by Captain Freycinet, during the years 1817, 1818, 1819, and 1820 publisher Treuttel & Wurtz, Treuttal, jun. & Richter year 1823 url http books.google.com books?id rLENAAAAQAAJ ref Although he lost his sight in 1837, he went on traveling and writing for the theater. In Curieux voyage autour du monde 1853 ... jacques arago texte.html Curieux voyage autour du monde de Jacques Arago ref He died in Rio de ... Damon Holt. ref cite web title Tattoo Traditions of Hawai i Original Drawings by Jacques Arago John ... cmshaa academy index.aspx?id 1524 accessdate 2010 02 13 ref Gallery commons category Jacques Arago ... by Jacques Arago, 1819, Honolulu Academy of Arts.jpg Ooro, One of the Principal Officers of Kamehameha ... 3A 22Jacques 20Arago 22 20OR 20description 3A 22Jacques 20Arago 22 Works by or about Jacques Arago ... Persondata . NAME Arago, Jacques ALTERNATIVE NAMES SHORT DESCRIPTION DATE OF BIRTH 6 March 1790 PLACE OF BIRTH DATE OF DEATH 27 November 1855 PLACE OF DEATH DEFAULTSORT Arago, Jacques Category ... writers France writer stub ca Jaume Arag da Jacques Arago de Jacques Arago fr Jacques Arago pl Jacques Arago pt Jacques Arago ru , sv Jacques Arago uk ... more details
Use dmy dates date May 2011 Image Etienne Arago.jpeg right thumb tienne Arago 9 February 1802 &ndash 7 March 1892 was a French writer and politician, and co founder with Maurice Alhoy of the newspaper Le Figaro . Early life Arago was born in Perpignan , the youngest of the four Arago brothers. He entered the cole Polytechnique but left due to involvement with the Carbonari . Career He pursued literary interests and was an acquaintance of Honor de Balzac they co wrote an unsuccessful novel . In 1829, he became director of the Th tre du Vaudeville it closed in 1838, leaving him with considerable debts. In February 1848, during the French Revolution of 1848 Revolution of that year , he became director of the national post office. ref name revolution He was active in political movements and opposed Napoleon III , and was in exile in Belgium from 1849 to 1859. He briefly served as mayor of Paris, for two months in 1870, during the Franco Prussian War . Later, he was involved in a diplomatic mission to Italy . Family Arago s brothers included Fran ois Arago Fran ois astronomer, physicist, politician Jean, who emigrated to North America and became a general in the Mexican army and Jacques Arago Jacques tienne Victor , who took part in Louis de Freycinet s exploring voyage in the ship Uranie from 1817 to 1821, and on his return to France devoted himself to his journalism and the drama ... P. Putnam location New York accessdate 17 February 2011 ref External links fr tienne Arago cite Men of the Time name Arago, Etienne pages 46&ndash 47 Persondata Metadata see Wikipedia Persondata . NAME Arago, Etienne ALTERNATIVE NAMES SHORT DESCRIPTION DATE OF BIRTH 9 February 1802 PLACE OF BIRTH DATE OF DEATH 7 March 1892 PLACE OF DEATH DEFAULTSORT Arago, Etienne Category 1802 births Category 1892 ... cs tienne Arago da tienne Arago de tienne Arago es tienne Arago fr tienne Arago it tienne Arago ru , sv tienne Arago ... more details
Arago s rotations is an observable phenomena effect discovered by Fran ois Arago in 1824. In the effect, as a copper disc is rotated in its own plane, and if a magnetic needle be freely suspended on a pivot over the disc, the needle will rotate with the disc. If on the other hand the needle is fixed it will tend to retard the motion of the disc. See also Faraday effect Induction motor History of electromagnetism Further reading Walter Baily, http books.google.com books?id 85AOAAAAIAAJ&pg PA286&lpg PA286 A Mode of producing Arago s Rotation . June 28, 1879. Philosophical magazine a journal of theoretical, experimental and applied physics. Taylor & Francis., 1879 Category Magnetism electromagnetism stub ja ... more details
Arago is an unincorporated area unincorporated community in Coos County, Oregon Coos County , Oregon , on the Coquille River , about six miles south of Coquille, Oregon Coquille . The area s elevation is 30 feet 9 m . ref cite gnis 1117024 Arago ref Firefighting services are provided by the Coquille Rural Fire District and law enforcement services by the Coos County Sheriff and Myrtle Point, Oregon Myrtle Point police. Citation needed date October 2009 History The Arago post office was named for Cape Arago , which in turn was named for France French physicist and geographer Fran ois Arago . ref name OGN cite book last McArthur first Lewis A. authorlink Lewis A. McArthur coauthors Lewis L. McArthur title Oregon Geographic Names origyear 1928 edition Seventh Edition year 2003 publisher Oregon Historical Society Press location Portland, Oregon Portland , Oregon isbn 0 87595 277 1 pages 29, 159 ref The previously suggested name of Halls Prairie was disapproved by postal authorities. ref name OGN References reflist Coord 43 06 07 N 124 11 32 W display title Coos County, Oregon Category Unincorporated communities in Coos County, Oregon CoosOR geo stub ... more details
Arago Glacier Coord 64 51 S 62 23 W display inline,title is a glacier flowing into Andvord Bay just northwest of Moser Glacier , on the west coast of Graham Land . It was mapped by the Falkland Islands Dependencies Survey from air photos taken by Hunting Aerosurveys Ltd in 1956&ndash 57, and named by the United Kingdom Antarctic Place Names Committee in 1960 for Fran ois Arago , the France French geodesist who first demonstrated the application of photography to mapmaking in 1839. References usgs gazetteer id 532 Category Glaciers of Graham Land Category Danco Coast DancoCoast geo stub ... more details
wiktionary on the spot on the spot On the spot may refer to On the Spot TV series On the Spot TV series , a series which aired during 2003 on the WB Television Network On the Spot Canadian TV series On the Spot Canadian TV series , produced by the National Film Board of Canada from 1953 54 GameSpot On the Spot On the Spot , a weekly webcast hosted by GameSpot On the Spot game show On the Spot game show , a locally produced game show which aired from 1984 to 1987 on KGW TV in Portland, OR On the Spot UK game show On the Spot UK game show , a game show in the United Kingdom, which is also in conjunction with the National Lottery List of The Price Is Right pricing games On the Spot On the Spot , a retired pricing game from The Price Is Right On the Spot 2011 TV series On the Spot 2011 TV series , a reality trivia TV series that debuted in US syndication in 2011 On the Spot organization , student broadcast organization at UC Santa Cruz disambiguation ... more details
wiktionarypar spot The common noun or verb spot has many meanings in English. Otherwise, Spot or SPOT may refer to Advertising Radio spot TV spot Underwriting spot Fiction Spot the Dog , a series of children s books adapted for animation Spot chicken , a character in 101 Dalmatians The Series Spot comics , a Spider Man villain Spot Star Trek , a pet cat in Star Trek The Next Generation A character ... of dog . Localities The Spot, New South Wales , a locality in Sydney, Australia Music Spot album Spot album , by the synthpop band And One Spot music festival , a music festival held in Denmark SPOT producer , the house producer and engineer for the label SST Records Spot rapper producer Singing ... Pistols toured under in the United Kingdom . Biology Spot croaker , a fish Leiostomus xanthurus SpoT Biology , a bacterial protein that hydrolizes p ppGpp Spot disease , several typically spot forming ... rosae Black Spot on roses Pimple , a skin blemish Cherry angioma Campbell de Morgan spots , small ... period. Other meanings Cool Spot , a mascot for 7 Up soft drinks Spot professional wrestling , a pre planned wrestling move or series of moves SPOT satellites , Satellite Pour l Observation de la Terre, Earth observing satellite family SPOT Satellite Messenger Spot date , a financial term Spot Fetcher , a dog owned by U.S. President George W. Bush Spot price , a financial term for price ... as Spot , digital artist and VJ A nickname for a Stage lighting instrument Spotlights spotlight ... dollars Screening passengers by observation techniques SPOT , an Airport security United States airport ... engineering. USS Spot , an American submarine that served during World War II. Spot market is a financial market, in which financial instruments or commodities are traded for immediate delivery on the spot . See also lookfrom Spot Spotz disambiguation disambig da Spot de Spot es Spot fr Spot ko it Spot nl Spot ja pl Spot sr Spot vi V t en ... more details
Refimprove date January 2009 SpoT is a bacterial protein that Hydrolysis hydrolizes alarmone s, p ppGpp , in the bacterial stringent response . Its hydrolase activity is Mn2 dependent with a conserved His Asp HD motif. In E coli, SpoT protein consistent of 693 amino acids. SpoT is belongs to the RSH protein family. It is bifunctional, has both hydrolase and synthase activities. When relA is deleted, E coli still can produce p ppGpp by SpoT. SpoT can sense many sources of nutrient stress other than amino acid starvation and to respond by limiting hydrolase. The acyl carrier protein ACP binds to the TGS domain of SpoT and this binding is probably influenced by the ratio of unacylated ACP to acylated ACP in the cell. Fatty acid starvation lead to a shift in the balance of the two SpoT actvities in favor of synthesis. Phosphate starvation is sensed by SpoT hydrolase to elevate p ppGpp, which induces IraP, a RssB antiadaptor that antagonizes RssB activation of RpoS turnover, thereby inducing RpoS. Category Bacterial proteins protein stub ... more details
Other uses Spot disambiguation Spot Original research date September 2007 The Spot , or thespot.com , was the second episodic online story 1995 1997 , after an earlier experiment by AOL s QuantumLink Serial , and pioneered the underwriting of Bandwidth computing bandwidth and production costs by offering paid advertising banners on the web pages and product placement within the journal entries. The site earned one of the original Webby Awards . Overview The Spot was likened to Melrose Place 1992 TV series Melrose Place on the Web and featured a rotating cast of attractive actors playing trendy and hip twenty somethings who rented rooms in a fabled southern California beach house called The Spot ... basis with the Spotmates and each other, discussing the newsworthy events. The Spot engaged ... & Collins asked their Vice President, Sheri Herman to bring in venture capital as The Spot was not being .... The Spot continued producing original content through the late spring and early summer of 1997, when ... of The Spot . Each of those additional webisodics, like the Spot before them, attracted a significant ... to sustain them financially. The Spot closed its initial production run the night of June 30 July ... live message boards open, for about two years after the last original episode went live. The Spot ... elgonquin.com remains online with archived entries available for view, 12 years after The Spot itself ... early in 2009. Some of The Spot s original creative team are also active today online, including original ... which continue in production and air online through ironsink.com. The Spot was brought back to life ... 2100 1001 3 261680.html The Spot s stain spreads , CNET News, January 14 1997 http news.com.com Death marks The Spot 2100 1023 3 201052.html Death marks The Spot , CNET News, July 1 1997 http sideroad.com ... wired archive 4.06 updata.html Hittin the Spot Wired 3.11, page 68 External links Portalbox Internet http web.archive.org http www.thespot.com TheSpot.com Archive DEFAULTSORT Spot, The Category 1995 ... more details
lunar crater data latitude 6.2 N or S N longitude 21.4 E or W E diameter 26 km depth 1.8 km colong 358 eponym Fran ois Arago Arago is a moon lunar impact crater located in the western part of the Mare Tranquillitatis . To the southwest lies the crater Manners crater Manners , and beyond are Dionysius crater Dionysius and the Ritter crater Ritter Sabine crater Sabine crater pair. To the southeast is the large Lamont lunar crater Lamont formation that has been submerged by the Lunar mare mare . The rim of Arago has a bulge in the western wall. There is a central ridge that runs towards the northern wall. The surface of the mare nearby is marked by wrinkle ridge s, most notably to the east and southeast. To the north is a large lunar dome designated Arago Alpha . A similar sized lunar dome is located an equal distance to the west, designated Arago Beta . Satellite craters By convention these features are identified on lunar maps by placing the letter on the side of the crater mid point that is closest to Arago. class wikitable width 25 style background eeeeee Arago width 25 style background eeeeee Latitude width 25 style background eeeeee Longitude width 25 style background eeeeee Diameter align center B align center 3.4 N align center 20.8 E align center 7 km align center C align center 3.9 N align center 21.5 E align center 3 km align center D align center 6.9 N align center 22.4 E align center 4 km align center E align center 8.5 N align center 22.7 E align center 6 km References Lunar crater references Moon crater stub Category Impact craters on the Moon da Arago m nekrater de Arago Mondkrater fr Arago crat re lunaire sv Arago m nkrater ... more details
Survey or Coast and Geodetic Survey to bear the name. Arago was built by Maury and Steinburg ... , Arago became a part of the new service. From 1871 until 1881, she was one of two ships in Coast Survey and Coast and Geodetic Survey named Arago , the other being USC&GS Arago 1854 Arago of 1854. Arago ... Survey Ships Arago DEFAULTSORT Arago 1871 Category Ships of the United States Coast and Geodetic Survey ... more details
Infobox park name Cape Arago State Park photo Cape arago.jpg photo width 300 photo caption Oregon State Parks map Oregon map width 220 type Public, state location Coos County, Oregon Coos County , Oregon nearest city Coos Bay, Oregon Coos Bay lat d 43.3062214 long d 124.3934519 region US OR source gnis coords ref ref name gnis cite gnis id 1118591 name Cape Arago State Park accessdate 2011 06 25 ref area created operator Oregon Parks and Recreation Department visitation num status open Cape Arago State Park is a state park in the U.S. state of Oregon , administered by the Oregon Parks and Recreation Department . History In 1579 Sir Francis Drake is purported to have sought shelter for his ship, the Golden Hind Golden Hinde , around Cape Arago. ref name arago001 cite book title The Secret Voyage of Sir Francis Drake 1577 1580 pages 363 author Samuel Bawlf isbn 0802714056 year 2003 publisher Walker & Company 1St Edition edition May 1, 2003 location New York ref ref name City http www.coosbayonline.com cb aboutcb CBHistory.htm History of Coos Bay . City of Coos Bay. Accessed September 2010. ref See also List of Oregon state parks References reflist External links cite web url http www.oregonstateparks.org park 94.php title Cape Arago State Park publisher Oregon Parks and Recreation Department accessdate 2011 06 25 Protected Areas of Oregon Category Oregon state parks Category Parks in Coos County, Oregon CoosOR geo stub de Cape Arago State Park ... more details
Infobox lighthouse image name Cape Arago Lighthouse.jpg image width 260px caption Cape Arago Light location Gregory Point, Charleston, Oregon Charleston , Oregon coordinates coord 43.34123 124.37543 format dms type landmark region US display inline,title ref name friends cite web title Cape Arago Lighthouse, Oregon publisher LighthouseFriends.com url http www.lighthousefriends.com light.asp?ID 129 ref yearlit 1934 automated 1966 yeardeactivated 2006 foundation Concrete construction Reinforced concrete appearance White tower, green lantern, red dome shape Octagonal attached to fog signal building height convert 44 ft m lens Fourth order Fresnel lens Fresnel range convert 16 mi km characteristic Group Flash White, 20 seconds 3 Flashes The Cape Arago Light formerly known as Cape Gregory Light is a lighthouse located in Charleston, Oregon Charleston , Oregon . It is located convert 2.6 mi km north of Cape Arago State Park Cape Arago . History File Cape Arago Lighthouse and Dwelling, 10 1944 NARA 298183.jpg thumb left 150px October, 1944. Starting in the mid 19th century, Coos Bay had become an important shipping point on the west coast of the United States . The amount of shipping at the time warranted the building of a light at the location, and in 1864, funds were given to build ... Arago Light publisher rudyalicelighthouse.net accessdate 2010 07 07 ref File Cape Arago Light.jpg left thumb The Cape Arago Light However, sailor s demands for a better light and the threat of erosion ... removed and the building was converted into an office. ref name rudylight File Cape Arago Lighthouse, 1947 NARA 298185.tif thumb right 150px Cape Arago Lighthouse, 1947 In 1966, the light was automated ... category http www.discoveroregonlighthouses.com arago.html Discover Oregon Lighthouses Cape Arago http www.lighthousefriends.com light.asp?ID 129 Cape Arago Lighthouse entry at Lighthouse Friends.com http www.cr.nps.gov maritime light capearag.htm Cape Arago Light entry in National Park Service ... more details
United States Ship flag USN flag 1881 Ship name Arago Ship namesake France French astronomer and physicist Dominique Fran ois Jean Arago 1786 1853 Ship ordered Ship awarded Ship builder Fardy and Brothers ... s blockading squadron. Ship notes otherships USC&GS Arago USC&GS Arago was a survey ship that served ... Survey from 1878 to 1881. From October 1861 into 1863 Arago was at times attached to the Navy s South ... Arago was built by Fardy and Brothers at Baltimore, Maryland in 1854. She did survey work for the Coast Survey along the Atlantic coast of the United States. Service History Arago was surveying under ... by foot to Galveston seeking help. The Coast Survey schooner Belle , working with Arago , ref cite ... February 2012 ref brought anchors and gear so that on May 25 Arago was again afloat with little damage ... isbn page pages 400 401 url accessdate 29 February 2012 ref During 1861 the Arago was working ... States Life Saving Service to become the United States Coast Guard . In effect, the Arago ... for Eastport and the lack of any other government ship, Arago was directed to seize be on the lookout ... these seizures under Mr. Robert Platt, the Arago s first officer she was required to send an armed ... danfs a10 arago.htm title Arago author Naval History and Heritage Command date work Dictionary ... 16, 1861 from Secretary of the Navy Gideon Welles to the Secretary of Treasury Arago was ordered ... Yard. Arago and the steamer Vixen joined the squadron and sailed only to have the fleet scattered ... rejoined Arago and Vixen participated in the expedition to seize Port Royal, South Carolina . ref ... fleet operations with surveys and buoying channels. In July 1862 Arago , with the schooner Caswell ... Resumption of regular service Arago was again in South Carolina in May, 1863 surveying passages between ..., commanding Arago , brought up the ship and ship s company for assistance, but the revolt did not occur ... in New Berne, North Carolina tasked with patrolling the inland sounds of North Carolina where the Arago ... more details
orphan date August 2010 The Fresnel Arago laws are three laws which summarise some of the more important properties of Interference wave propagation interference between light of different states of polarization waves polarization . Augustin Jean Fresnel and Fran ois Arago , both discovered the laws, which bear their name. The laws are as follows ref World of Physics http scienceworld.wolfram.com physics Fresnel AragoLaws.html ref 1. Two orthogonal , Coherence physics coherent linearly polarized waves cannot interfere. br 2. Two parallel coherent linearly polarized waves will interfere in the same way as Sunlight natural light . br 3. The two constituent orthogonal linearly polarized states of natural light cannot interfere to form a readily observable interference pattern, even if rotated into alignment because they are incoherent . One may understand this more clearly when considering two waves, given by the form math mathbf E 1 mathbf r ,t mathbf E 01 cos mathbf k 1 cdot r omega t epsilon 1 math and math mathbf E 2 mathbf r ,t mathbf E 02 cos mathbf k 2 cdot r omega t epsilon 2 math , where the boldface indicates that the relevant quantity is a Euclidean vector vector , interfering. We know that the intensity physics intensity of light goes as the electric field squared in fact, math I epsilon v mathbf E 2 T math , where the angled brackets denote a time average , and so we just add the fields before squaring them. Extensive algebra ref Which can be found in, e.g Optics, Hecht, 4th edition, pp. 386 7 ref yields a result for the intensity of the resultant wave, namely that math I 12 mathbf E 01 cdot E 02 cos delta math where math delta math represents the interference term the phase difference arising from a combined path length and initial phase angle difference math delta mathbf k 1 cdot r k 2 cdot r epsilon 1 epsilon 2 math . At this point, substituting various correct values of math delta math yields laws 1 & 3 above. References references It may look as if the above ... more details
wiktionary blue spot Blue spot may refer to Blue spot birthmark , a benign, flat, congenital birthmark Blue spot nucleus , a nucleus in the brain stem involved with physiological responses to stress and panic disambig ... more details
Green spot may refer to Green Spot soft drink , a non carbonated soft drink sold in South East Asia Green Spot whiskey , an Irish pot still whiskey disambig ... more details
Spot breasted may refer to Spot breasted Antvireo , a species of bird in the Thamnophilidae family Spot breasted Ibis , a species of bird in the Threskiornithidae family Spot breasted Lapwing , a species of bird in the Charadriidae family Spot breasted Laughingthrush , a species of bird in the Timaliidae family Spot breasted Oriole , a species of bird in the Icteridae family Spot breasted Parrotbill , a species of bird in the Timaliidae family Spot breasted Scimitar babbler , a species of bird in the Timaliidae family Spot breasted Thornbird , a species of bird in the Furnariidae family Spot breasted White eye , a species of bird in the Zosteropidae family Spot breasted Woodpecker , a species of bird in the Picidae family Spot breasted Wren , a species of bird in the Troglodytidae family disambig ... more details
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